A metal metre scale gives correct measurement at $$00C$$. It is generally used at a temperature of $$400C$$. The correction to be made for every metre is $$($$α $$=$$ $$10-6/0C)$$

Correct option is 24 × 10–5 m to be added

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A metal metre scale gives correct measurement at 0⁰C. It is generally used at a temperature of 40⁰C. The correction to be made for every metre is (α = 10^-6/⁰C)

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4 × 10–5 m

4 × 10–5 m to be added

4 × 10–5 m must be deducted

None of the above.

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Correct option is B

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A metal metre scale gives correct measurement at 00C. It is generally used at a temperature of 400C. The correction to be made for every metre is (α = 10-6/0C)

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A metal metre scale gives correct measurement at 0⁰C. It is generally used at a temperature of 40⁰C. The correction to be made for every metre is (α = 10^-6/⁰C)